diff --git a/php4dllts.dsp b/php4dllts.dsp
index 48ac55c033d..20a79f05acf 100644
--- a/php4dllts.dsp
+++ b/php4dllts.dsp
@@ -149,6 +149,10 @@ SOURCE=.\main.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\php_ticks.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\mergesort.c
 # End Source File
 # Begin Source File